cover
Paul B.

Paul B.

Joined on 01/15/07

0
0

Product Reviews
product reviews
  • 1
Most Favorable Review

No voltage control for 3-pin fans with this cable

Coboc LP45TX4-18 Sleeved 18 inch 4-pin Molex LP4  to Five(5)  x  4-pin TX4 PWM Fan Power Splitter Adapter Converter Cable with one TX4 Female for RPM Feedback
Coboc LP45TX4-18 Sleeved 18 inch 4-pin Molex LP4 to Five(5) x 4-pin TX4 PWM Fan Power Splitter Adapter Converter Cable with one TX4 Female for RPM Feedback

Pros: Built as described

Cons: Wasn't what I wanted - but that was because of my ignorance about the subject

Overall Review: I rarely write reviews but am writing this one for anyone who might have been ignorant about the subject and mistakenly bought this to control 3-pin fans from a master 4-pin PWM controlled fan. This cable requires all of the fans to be PWM in order to use PWM on all of the attached fans. The main PWM fan that sends the signals back to the MB header drive all of the other fans from the PWM signal - through the 4th pin connector. The thing that does what I wanted to do, and that I just bought, is the Phanteks PW-PWHUB_01 PWM fan hub: https://www.newegg.com/Product/Product.aspx?Item=9SIA4RE5032993# 3-pin fans have their speed controlled through voltage control through pin #2. 4-pin PWM fans have PWM control through the 4th pin (which of course doesn't exist in a 3-pin fan). If you look at this particular splitter, you see that the main fan sending PWM signals back to the MB has all 4 wires going into the MB header and then splits to cables having only pins #4, #2, and #1 (no #3 pin wire). So the main PWM fan is using PWM to control the other fans in the series - not voltage control through pin #2 which is what a 3-pin fan uses to control its speed. So 3-pin fans in this array will always run at top speed (from the 12V it always gets). The Phanteks hub above is the only thing I've found that does what I want - which is to use one 4-pin PWM fan to connect into the MB header and voltage control an array of less expensive 3-pin fans based on the PWM signals to that main fan. The Phanteks hub uses its own logic board to split up things in that way. This is the less expensive way to go than to use all 4-pin PWM fans in the array - where only the main PWM fan controls all of their speeds. There's simply no need for the other fans to be PWM. In the future it could possibly be the case that all fans are PWM fans and about the same price as 3-pin fans - and then a splitter such as this would make more sense. But that isn't the case today and so it is a waste to use separate PWM fans all controlled by the one fan talking PWM to the MB. I gave it 4 stars even though I never got around to using this because for all I know the splitter is perfectly fine for what it is. It seemed well-built enough to me (unlike what I read in some of the reviews here ... maybe it has been improved since then). I'm posting this review for others who might not be clear on how fan control works and thought that this cable could do what I intended to use it to do.